EG_IMAGE * egDecodePNG(IN UINT8 *FileData, IN UINTN FileDataLength, IN UINTN IconSize, IN BOOLEAN WantAlpha) {
EG_IMAGE *NewImage = NULL;
unsigned Error, Width, Height;
EG_PIXEL *PixelData;
lode_color *LodeData;
UINTN i;
Error = lodepng_decode_memory((unsigned char **) &PixelData, &Width, &Height, (unsigned char*) FileData,
(size_t) FileDataLength, LCT_RGBA, 8);
if (Error) {
return NULL;
}
// allocate image structure and buffer
NewImage = egCreateImage(Width, Height, WantAlpha);
if ((NewImage == NULL) || (NewImage->Width != Width) || (NewImage->Height != Height))
return NULL;
LodeData = (lode_color *) PixelData;
// Annoyingly, EFI and LodePNG use different ordering of RGB values in
// their pixel data representations, so we've got to adjust them....
for (i = 0; i < (NewImage->Height * NewImage->Width); i++) {
NewImage->PixelData[i].r = LodeData[i].red;
NewImage->PixelData[i].g = LodeData[i].green;
NewImage->PixelData[i].b = LodeData[i].blue;
if (WantAlpha)
NewImage->PixelData[i].a = LodeData[i].alpha;
}
lodepng_free(PixelData);
return NewImage;
} // EG_IMAGE * egDecodePNG()
//Test LodePNG encoding and decoding the encoded result, using the C interface
void doCodecTest(Image& image)
{
unsigned char* encoded = 0;
size_t encoded_size = 0;
unsigned char* decoded = 0;
unsigned decoded_w;
unsigned decoded_h;
double t_enc0 = getTime();
unsigned error_enc = lodepng_encode_memory(&encoded, &encoded_size, &image.data[0],
image.width, image.height, image.colorType, image.bitDepth);
double t_enc1 = getTime();
assertEquals(0, error_enc, "encoder error C");
double t_dec0 = getTime();
for(int i = 0; i < NUM_DECODE; i++)
{
unsigned error_dec = lodepng_decode_memory(&decoded, &decoded_w, &decoded_h,
encoded, encoded_size, image.colorType, image.bitDepth);
assertEquals(0, error_dec, "decoder error C");
}
double t_dec1 = getTime();
assertEquals(image.width, decoded_w);
assertEquals(image.height, decoded_h);
printValue("encoding time", t_enc1 - t_enc0, "s");
std::cout << "compression: " << ((double)(encoded_size) / (double)(image.data.size())) * 100 << "%"
<< " ratio: " << ((double)(image.data.size()) / (double)(encoded_size))
<< " size: " << encoded_size << std::endl;
total_enc_size += encoded_size;
total_enc_time += (t_enc1 - t_enc0);
if(NUM_DECODE> 0) printValue("decoding time", t_dec1 - t_dec0, "/", NUM_DECODE, " s");
total_dec_time += (t_dec1 - t_dec0);
std::cout << std::endl;
//LodePNG_saveFile(encoded, encoded_size, "test.png");
free(encoded);
free(decoded);
}
DeletablePixels loadPng(const Path &path, int &w, int &h, int &channels)
{
uint64 size = FileUtils::fileSize(path);
InputStreamHandle in = FileUtils::openInputStream(path);
if (size == 0 || !in)
return makeVoidPixels();
std::unique_ptr<uint8[]> file(new uint8[size_t(size)]);
FileUtils::streamRead(in, file.get(), size_t(size));
uint8 *dst = nullptr;
uint32 uw, uh;
lodepng_decode_memory(&dst, &uw, &uh, file.get(), size_t(size), LCT_RGBA, 8);
if (!dst)
return makeVoidPixels();
w = uw;
h = uh;
channels = 4;
return DeletablePixels(dst, free);
}
void parg_asset_preload(parg_token id)
{
if (!_pngsuffix) {
_pngsuffix = sdsnew(".png");
}
sds filename = parg_token_to_sds(id);
parg_buffer* buf = parg_buffer_from_path(filename);
parg_assert(buf, "Unable to load asset");
if (sdslen(filename) > 4) {
sds suffix = sdsdup(filename);
sdsrange(suffix, -4, -1);
if (!sdscmp(suffix, _pngsuffix)) {
unsigned char* decoded;
unsigned dims[3] = {0, 0, 4};
unsigned char* filedata = parg_buffer_lock(buf, PARG_READ);
unsigned err = lodepng_decode_memory(&decoded, &dims[0], &dims[1],
filedata, parg_buffer_length(buf), LCT_RGBA, 8);
parg_assert(err == 0, "PNG decoding error");
parg_buffer_free(buf);
int nbytes = dims[0] * dims[1] * dims[2];
buf = parg_buffer_alloc(nbytes + 12, PARG_CPU);
int* ptr = parg_buffer_lock(buf, PARG_WRITE);
*ptr++ = dims[0];
*ptr++ = dims[1];
*ptr++ = dims[2];
memcpy(ptr, decoded, nbytes);
free(decoded);
parg_buffer_unlock(buf);
}
sdsfree(suffix);
}
if (!_asset_registry) {
_asset_registry = kh_init(assmap);
}
int ret;
int iter = kh_put(assmap, _asset_registry, id, &ret);
kh_value(_asset_registry, iter) = buf;
}
void CPicture::LoadPNG( CDataStream& dataStream )
{
lodepng_decode_memory( (unsigned char**)&m_pPixelData, &m_width, &m_height, (unsigned char*)dataStream.GetCursorData(), dataStream.GetSize(), LodePNGColorType::LCT_RGBA, 8 );
m_format = ePF_R8G8B8A8;
m_mipMapCount = 0;
}
